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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hi Piotr，     I applied this patch: https://github.com/warpme/minimyth2/blob/master/script/kernel/linux-6.18/files/0312-drm-meson-add-vpu-clk-setting-for-S4.patch, and ran it on the board.     I encountered the same issue—the system froze.     I found that the patch has a few minor problems. After fixing them, the system runs normally. Could you try the following patch? 在 2025/12/3 13:56, Ao Xu 写道: > Hi Piotr， > >     I will need about two more days to look into it. I will follow up > with you ASAP. > > > 在 2025/12/2 16:29, Piotr Oniszczuk 写道: >> [You don't often get email from piotr.oniszczuk@gmail.com. Learn why >> this is important at https://aka.ms/LearnAboutSenderIdentification ] >> >> [ EXTERNAL EMAIL ] >> >> Ao, >> Any chance for updated s4 hdmi series for 6.18? >> >> >>> Wiadomość napisana przez Ao Xu w dniu 21 lis >>> 2025, o godz. 03:55: >>> >>> Hi Piotr， >>> >>>      I will check this issue >>> >>> 在 2025/11/19 18:27, Piotr Oniszczuk 写道: >>>> [You don't often get email from piotr.oniszczuk@gmail.com. Learn >>>> why this is important at >>>> https://aka.ms/LearnAboutSenderIdentification ] >>>> >>>> [ EXTERNAL EMAIL ] >>>> >>>> Pls see inline >>>> >>>>> Wiadomość napisana przez Chuan Liu w dniu >>>>> 19 lis 2025, o godz. 03:57: >>>>> >>>>> Hi Piotr, >>>>> >>>>> >>>>> On 11/18/2025 10:50 PM, Piotr Oniszczuk wrote: >>>>>> [You don't often get email from piotr.oniszczuk@gmail.com. Learn >>>>>> why this is important at >>>>>> https://aka.ms/LearnAboutSenderIdentification ] >>>>>> [ EXTERNAL EMAIL ] >>>>>> Ao, >>>>>> Is there any chance to get this s4 drm hdmi series for current 6.18? >>>>>> (i tried backport this series to 6.18 but have some issues with >>>>>> reparent vpu_0_sel to sysclk_b_sel) >>>>> Why do we need to reparent vpu_0_sel to sysclk_b_sel? is there any >>>>> background here? >>>> Well - it looks it is because bug.... >>>> Martin Blumenstingl had perfect eye and catch typo in patch >>>> https://lore.kernel.org/all/20250110-drm-s4-v1-11-cbc2d5edaae8@amlogic.com/: >>>> >>>> >>>> By replacing: >>>> assigned-clock-parents = <&clkc_periphs CLKID_FCLK_DIV3>, >>>> <0>, /* Do Nothing */ >>>> <&clkc_periphs CLKID_VPU_0>, >>>> <&clkc_periphs CLKID_FCLK_DIV4>, >>>> <0>, /* Do Nothing */ >>>> <&clkc_periphs CLKID_VAPB_0>; >>>> >>>> with: >>>> assigned-clock-parents = <&clkc_pll CLKID_FCLK_DIV3>, >>>> <0>, /* Do Nothing */ >>>> <&clkc_periphs CLKID_VPU_0>, >>>> <&clkc_pll CLKID_FCLK_DIV4>, >>>> <0>, /* Do Nothing */ >>>> <&clkc_periphs CLKID_VAPB_0>; >>>> >>>> dmesg is like this https://termbin.com/6020 >>>> >>>> So i'm getting hdmi working - but only when device boots _without_ >>>> connected hdmi at boot (and connected later) >>>> If hdmi is connected at boot - boot hangs at: >>>> >>>>      0.341676] meson-dw-hdmi fe300000.hdmi-tx: Detected HDMI TX >>>> controller v2.01a with HDCP (meson_dw_hdmi_phy) >>>> [    0.342750] meson-dw-hdmi fe300000.hdmi-tx: registered >>>> DesignWare HDMI I2C bus driver >>>> [    0.343660] meson-drm ff000000.vpu: bound fe300000.hdmi-tx (ops >>>> meson_dw_hdmi_ops) >>>> [    0.344832] [drm] Initialized meson 1.0.0 for ff000000.vpu on >>>> minor 0 >>>> >>>> FYI: It is after applying >>>> https://patchwork.kernel.org/project/linux-amlogic/cover/20250110-drm-s4-v1-0-cbc2d5edaae8@amlogic.com/ >>>> on mainline 6.18 (with some my adjustments on this series required >>>> by changes in 6.18). >>>> For VPU clk changes see >>>> https://github.com/warpme/minimyth2/blob/master/script/kernel/linux-6.18/files/0312-drm-meson-add-vpu-clk-setting-for-S4.patch >>>> It is 6.18 adaptation of >>>> https://patchwork.kernel.org/project/linux-amlogic/patch/20250110-drm-s4-v1-9-cbc2d5edaae8@amlogic.com/ >>>> >>>> As kernel hangs - i have limited caps to drill where root cause is. >>>> >>>> Maybe above hang is reason of my backports or missing any pre-req >>>> required to get s4 drm working? >>>> Anyway - it will be good to test with updated to 6.18 series of Add >>>> DRM support for Amlogic S4 (plus info about any pre-req required to >>>> get s4 drm working) >>>> >>>> >>>>> The vpu_clk on S4 doesn't support sysclk_b_sel as one of its >>>>> selectable clock sources, so this reparent operation will definitely >>>>> fail. This has nothing to do with the kernel version. >>>>> >>>>>>> Wiadomość napisana przez Ao Xu via B4 Relay >>>>>>> w dniu 10 sty 2025, o >>>>>>> godz. 06:39: >>>>>>> >>>>>>> From: Ao Xu >>>>>>> >>>>>>> Add devicetree document for S4 HDMI controller >>>>>>> >>>>>>> Signed-off-by: Ao Xu >>>>>>> --- >>>>>>> Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml >>>>>>> | 1 + >>>>>>> 1 file changed, 1 insertion(+) >>>>>>> >>>>>>> diff --git >>>>>>> a/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml >>>>>>> b/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml >>>>>>> >>>>>>> index >>>>>>> 84d68b8cfccc86fd87a6a0fd2b70af12e51eb8a4..6e0a8369eee915fab55af24d450a6c40e08def38 >>>>>>> 100644 >>>>>>> --- >>>>>>> a/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml >>>>>>> >>>>>>> +++ >>>>>>> b/Documentation/devicetree/bindings/display/amlogic,meson-dw-hdmi.yaml >>>>>>> >>>>>>> @@ -55,6 +55,7 @@ properties: >>>>>>>            - const: amlogic,meson-gx-dw-hdmi >>>>>>>        - enum: >>>>>>>            - amlogic,meson-g12a-dw-hdmi # G12A (S905X2, S905Y2, >>>>>>> S905D2) >>>>>>> +          - amlogic,meson-s4-dw-hdmi # S4 (S905Y4) >>>>>>> >>>>>>>    reg: >>>>>>>      maxItems: 1 >>>>>>> >>>>>>> -- >>>>>>> 2.43.0 >>>>>>> >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> linux-amlogic mailing list >>>>>>> linux-amlogic@lists.infradead.org >>>>>>> http://lists.infradead.org/mailman/listinfo/linux-amlogic >>>>>> _______________________________________________ >>>>>> linux-amlogic mailing list >>>>>> linux-amlogic@lists.infradead.org >>>>>> http://lists.infradead.org/mailman/listinfo/linux-amlogic --------------o0aZcQ0HMxcBDqAugnnPLsZf Content-Type: text/plain; charset=UTF-8; name="fix-vpu-clk-setting-for-s4.patch" Content-Disposition: attachment; filename="fix-vpu-clk-setting-for-s4.patch" Content-Transfer-Encoding: base64 SW5kZXg6IGxpbnV4LW5leHQvbWVzb25fdmNsay5jCj09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KLS0tIGxpbnV4LW5leHQu b3JpZy9tZXNvbl92Y2xrLmMJMjAyNS0xMi0wNSAxNDo1ODoyOS4wMzE0NTQxNzQgKzA4MDAKKysr IGxpbnV4LW5leHQvbWVzb25fdmNsay5jCTIwMjUtMTItMDUgMTU6MDA6MzQuOTM1MjA0MjE5ICsw ODAwCkBAIC01OTcsMTEgKzU5NywxMSBAQAogCQkudmNsa19kaXYgPSAxLAogCX0sCiAJW01FU09O X1ZDTEtfSERNSV8yNzAwMF0gPSB7Ci0JCS5wbGxfZnJlcSA9IDQzMjAwMDAsCi0JCS5waHlfZnJl cSA9IDI3MDAwMCwKLQkJLnZjbGtfZnJlcSA9IDU0MDAwLAotCQkudmVuY19mcmVxID0gMjcwMDAs Ci0JCS5waXhlbF9mcmVxID0gMjcwMDAsCisJCS5wbGxfZnJlcSA9IDQzMjAwMDAwMDAsCisJCS5w aHlfZnJlcSA9IDI3MDAwMDAwMCwKKwkJLnZjbGtfZnJlcSA9IDU0MDAwMDAwLAorCQkudmVuY19m cmVxID0gMjcwMDAwMDAsCisJCS5waXhlbF9mcmVxID0gMjcwMDAwMDAsCiAJCS5wbGxfb2QxID0g NCwKIAkJLnBsbF9vZDIgPSA0LAogCQkucGxsX29kMyA9IDEsCkBAIC0xMTQ4LDE1ICsxMTQ4LDE1 IEBACiAJCW1lc29uX2hkbWlfcGxsX3NldF9wYXJhbXMocHJpdiwgbSwgZnJhYywgb2QxLCBvZDIs IG9kMyk7CiAJfSBlbHNlIGlmIChtZXNvbl92cHVfaXNfY29tcGF0aWJsZShwcml2LCBWUFVfQ09N UEFUSUJMRV9TNCkpIHsKIAkJc3dpdGNoIChwbGxfYmFzZV9mcmVxKSB7Ci0JCWNhc2UgMjk3MDAw MDoKKwkJY2FzZSAyOTcwMDAwMDAwOgogCQkJbSA9IDB4N2I7CiAJCQlmcmFjID0gdmljX2FsdGVy bmF0ZV9jbG9jayA/IDB4MTQwYjQgOiAweDE4MDAwOwogCQkJYnJlYWs7Ci0JCWNhc2UgNDMyMDAw MDoKKwkJY2FzZSA0MzIwMDAwMDAwOgogCQkJbSA9IHZpY19hbHRlcm5hdGVfY2xvY2sgPyAweGIz IDogMHhiNDsKIAkJCWZyYWMgPSB2aWNfYWx0ZXJuYXRlX2Nsb2NrID8gMHgxYTNlZSA6IDA7CiAJ CQlicmVhazsKLQkJY2FzZSA1OTQwMDAwOgorCQljYXNlIDU5NDAwMDAwMDA6CiAJCQltID0gMHhm NzsKIAkJCWZyYWMgPSB2aWNfYWx0ZXJuYXRlX2Nsb2NrID8gMHg4MTQ4IDogMHgxMDAwMDsKIAkJ CWJyZWFrOwo= --------------o0aZcQ0HMxcBDqAugnnPLsZf Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic --------------o0aZcQ0HMxcBDqAugnnPLsZf--